Book-lock.



HQ 1). SNYDER.

BOOK LOOK.

APPLICATION FILED 00'I'.28, 1909.

Patented May 7, 1912.

UNITED sTArEs PATENT omen.

HARRY D. SNYDER, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO WILLIAM,

MANN COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN-SYLVANIA.

Specification of Letters Patent.

:eooK-LocK.

Patented May '7, 1912.

Application filed. October 28, 1909. Serial No. 525,220

To all whom it may concern:

Be it known that I, HARRY D. SNYDER, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented. certainImprovements in Book-Locks, of which the following is a specification.

The main object of this invention is to provide means for locking a bookso that access cannot be had to the leaves.

A further object is to make an adjustable locking mechanism so that itcan be applied to a loose leaf book in which the leaves between thecovers vary in number.

My invention, while particularly adapted for use in looking a book sothat access cannot be had to it, may be used also for look ing theleaves of the book to the cover.

In the accompanying drawing: Figure 1, is a perspective view of a blankbook illustrating my improved lock in position; Fig. 2, is a sectionalview on the line 22, Fig. 1; Fig. 3, is a perspective view of the lockdetached; Fig. 4, is a view showing the lock applied to the back of thebook; and Figs. 5 and 6, areviews of modifications.

A is the back of one form of loose leaf book, B, B are the covers hingedto the sections a, a of the back at b, In respectively, and c, c are theleaves, the number of which may be increased or diminished, as desired.The sections a, a of the book are made to move toward and from eachotherand are secured in the present instance by a suitable look a.

While I have shown my invention applied to a loose leaf book, it will beunderstood that it can be applied toa permanently bound book withoutdeparting from the essential features of the invention.

In the present instance secured to the cover B is plate D recessed at clto receive the flanged head 6 of the part E of the look. This part formsthe casing of the lock and has the usual spring-pressed tumblers c,illustrated by dotted lines. Swiveled in the casing is the hub section Ewhich is free to revolve in the part E, and in this hub-1s a key-slot 6to the screw threaded sleeve or spindle E The hub section E is securedby a'pin e in the present instance, so that the threaded sleeve turnswith the hub.

F is the bolt section of the lock comprising a stem having a T-head fadapted to a socket g in a plate G mounted in the cover B of the book,and has, preferably, a squared shank f adapted to a correspondingopening in the plate. The end f of the stem F is screw threaded and isadapted to the threads in the sleeve or spindle E so that on turning thesleeve the two covers will be drawn to-wardeach other.

Both sections of the lock may be removed from the cover so as to allowperfect freedom in turning the leaves of the book, and. can be readilyapplied by simply mounting each section in the socket and placing thekey I in the key-way e of the hub E and turning it so as to cause thesleeve E to engage the threads on the bolt F, and this action draws thecovers tightly onto the leaves, and when they are drawn to the positiondesired the key is withdrawn and the bolts or tumblers of the lockengage the'hub E and prevent the hub turning. Thus in the presentinstance, the key I acts as the selective means to effect the propercombination for the lock to free and allow movement of the member E andalso acts as a lever for turning the said member E However, it will beunderstood thatany form of selective means can be used without departingfrom the spirit of the present invention.

Both theflange e and the T-head are so embedded in their plates thatboth the covers will be smooth. In some instances one of the parts maybe hinged to the cover as shown in Fig. 6, in which the bolt- F ishinged to a plate G on the cover.

While I have described the invention particularly as applied to the openend of the book to secure the covers together in order to prevent theopening of the book, it may also be used at the back of the book,binding the leaves to the book, as illustrated in Fig. 4, the lock beingsimilar in all respects to that illustrated in Fig. 3, with theexception that the parts are adapted to enter the covers being hinged,as shown, so that the book can be readily opened without in terferingwith the lock for fastening the leaves together. The advantage of thisform of lock is that the leaves of the book cannot be removed withoutthe lock is first released.

In Fig. 5, I have shown a modification in which the bolt F is in theform of a sleeve having an internal screw thread, the said bolt having ahead which is adapted to a socket and is so shaped as to prevent thebolt turning in the socket. The hub E of the lock E carries an extensionE in this instance which enters the threaded opening in the bolt F.

While I have shown the shank f of the bolt squared to fit a squareopening in the plate Gr, it may be of any shape which will prevent itturning in the plate. The bolt may have a perfectly round head when usedwith a squared shank, or, if the T-head is used, the shank may be rounddepending upon the strength and thickness 01": the cover of the book.

I claim:

1. The combination in a book of the two covers; a threaded spindlemovably mounted in one coveradjacent the opening end of the book; a.series of tumblers; means for moving the tumblers into engagement withthe spindle to lock the latter to the said cover; a threaded stemsecured to the opposite cover and engaging the threaded spindle; meansfor moving the tumblers to permit movement of the said spindle; saidlatter means serving as a lever whereby the said spindle may be turnedto vary the distance between the two covers.

2. The combination in a book of the two covers; leaves mounted betweenthe covers; means for drawing the covers together so as to bind theleaves and prevent their withdrawal; said means consisting of a lock andtwo members; one member being movable with respect to the lock andadapted to engage the other member; said movable member also having akey slot formed therein adapted to receive a key for actuating the lock;said movable member serving when the key is inserted and turned toadjust the relative position of the'two covers and serving when the keyis removed tolock the several parts.

3. The combination of a book having a socket in each cover near theouter edge, a two-part locking device, one part consisting of a casingand rotatable stem mounted in the casing, a threaded sleeve carried bythe stem, locking mechanism in the casing arranged to engage the stemsaid mechanism being displaced by the insertion of a key so as to leavethe stem free to turn, the other part of the lock being in the form of abolt having a screw threaded stem adapted to the threaded sleeve of theother part of the lock, both parts being shaped so as to prevent theirturning in their sockets so that the covers of the book can be drawntogether by the locking mechanism when the key is inserted, and when thekey is removed the two-parts of the lock will be prevented from turningone in respect to the other by the engagement of the locking mechanismwith the stem of one part.

4. The combination of a book, plates providing sockets in the oppositesides of the book, a lock casing in non-rotative engagement with one ofthe sockets, a rotatable spindle journaled within said casing and havinga screw threaded extension, anonrotative bolt section adapted to thesocket in the other side of the book and having av threaded stemarranged to engage the threaded extension of the spindle, and meanswithin the lock casing for locking the rotatable spindle to the lockcasing.

5. The combination in a book lock, of a lock casing attached to onecover of a book, locking mechanism carried thereby, a hub rotatablymounted in the said casing and arranged to be locked to the lock casingby the said locking mechanism, a sleeve connected to the hub so as toturn therewith, said sleeve having a screw threaded section, and a boltattached to the opposite cover of the book and having a screw threadedstem adapted to the screw threaded sleeve.

6. The combination in a book, of plates providing sockets in the twosides thereof, a lock casing mounted in one socket and so shaped that itwill be prevented from turning therein, locking tumblers carried by thesaid casing, a hub rotatably mounted in the lock casing and havingapertures for the reception of the said tumblers, said hub having athreaded extension, with a bolt having a head mounted in the socket inthe other side of the book and shaped so as to prevent it from turningtherein, said bolt having a screw threaded section adapted to the threadof the said extension, the extension being free to turn on the insertionof the key in the lock and prevented from turning by the tumblers whenthe key is removed.

7 The combination of a book, a plate providing a socket in one cover ofthe book, a lock casing adapted to the said socket, looking mechanismcarried by the said casing, a rotatable hub also carried by the casingand arranged to be engaged by the locking mechanism, said hub having akey slot therein and a threaded extension, a bolt section carried by theother cover of the book and having a threaded stem arranged to beengaged by the threaded extension .of In testimony whereof, I havesigned my the other section of the look so that as the name to thisspecification, in the presence 10 key is inselrted the hub will bedisengagebd of two subscribing Witnesses.

from the ockin mechanism and ma e turned by the key to draw the coversoi? the HARRY SNYDER book toward or from each other, and on theWitnesses:

removal of the key the locking mechanism WM. E. SHUPE,

will lock the hub to the casing. WM. A. BARR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, I). G.

